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Design, Fabrication and Control of Reconfigurable Active Microstructures for Solar Sails.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Design, Fabrication and Control of Reconfigurable Active Microstructures for Solar Sails./
Author:	Ren, Zhongjing.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	157 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
Contained By:	Dissertations Abstracts International82-05B.
Subject:	Mechanical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28090649
ISBN:	9798678190147

Design, Fabrication and Control of Reconfigurable Active Microstructures for Solar Sails.
Ren, Zhongjing.

Design, Fabrication and Control of Reconfigurable Active Microstructures for Solar Sails. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 157 p.

Source: Dissertations Abstracts International, Volume: 82-05, Section: B.

Thesis (Ph.D.)--Stevens Institute of Technology, 2020.

This item must not be sold to any third party vendors.

Solar sails are flexible and reflective surfaces that enable spacecraft for solar sailing in space travel. Instead of storing and consuming propellant, spacecraft equipped with solar sails can make use of solar radiation pressure (SRP) resulting from the momentum change of photons from the sun for propulsion. The research objectives of this work are to understand the electro-thermal-mechanical coupling behavior of active microstructures for solar sailing applications through mathematic modeling and experimental verification. Requirements for the microstructures include high area-to-mass ratio, adjustable configuration, and high stiffness, etc. Grid microstructures consisting of active bilayer metallic beams made of aluminum and NiTi alloys are proposed. Reconfiguration of the microstructures is enabled by electro-thermal actuation of the bilayer metallic beams through Joule heating. A symmetric design made of dual bilayer metallic beams allows the multilayered microstructures to deploy from 2D to 3D. Design and fabrication of multilayered microstructures for solar sails are proposed and completed. In-situ electrical characterization of the microstructures proves that large 3D deployment (more than ~11µm) of 2D microstructures (~1.2um thick) is possible at 460K by applying a constant current of 5mA. Electro-thermal and thermo-mechanical models of the multilayered microstructures actuated by Joule heating in vacuum are established and validated by finite element analysis and experiments, which allow rapid prediction of deformation for a given electrical input. Finally, the thermo-mechanical analysis and mathematical modeling on a representative microstructure for a solar sailing application are conducted by considering the effects of Joule heating, solar radiation, and thermal reemission radiation simultaneously. Forces and moments resulting from solar radiation and thermal reemission are predicted. Numerical solutions from the electro-thermo-mechanical model of the microstructure are in good agreement with results given by finite element analysis. This model provides an efficient approach for active control of the forces and moments on the microstructures for solar sailing application.

ISBN: 9798678190147Subjects--Topical Terms:

557493
Mechanical engineering.
Subjects--Index Terms:

3D deployment

Design, Fabrication and Control of Reconfigurable Active Microstructures for Solar Sails.
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300 $a 157 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
500 $a Advisor: Shi, Yong.
502 $a Thesis (Ph.D.)--Stevens Institute of Technology, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Solar sails are flexible and reflective surfaces that enable spacecraft for solar sailing in space travel. Instead of storing and consuming propellant, spacecraft equipped with solar sails can make use of solar radiation pressure (SRP) resulting from the momentum change of photons from the sun for propulsion. The research objectives of this work are to understand the electro-thermal-mechanical coupling behavior of active microstructures for solar sailing applications through mathematic modeling and experimental verification. Requirements for the microstructures include high area-to-mass ratio, adjustable configuration, and high stiffness, etc. Grid microstructures consisting of active bilayer metallic beams made of aluminum and NiTi alloys are proposed. Reconfiguration of the microstructures is enabled by electro-thermal actuation of the bilayer metallic beams through Joule heating. A symmetric design made of dual bilayer metallic beams allows the multilayered microstructures to deploy from 2D to 3D. Design and fabrication of multilayered microstructures for solar sails are proposed and completed. In-situ electrical characterization of the microstructures proves that large 3D deployment (more than ~11µm) of 2D microstructures (~1.2um thick) is possible at 460K by applying a constant current of 5mA. Electro-thermal and thermo-mechanical models of the multilayered microstructures actuated by Joule heating in vacuum are established and validated by finite element analysis and experiments, which allow rapid prediction of deformation for a given electrical input. Finally, the thermo-mechanical analysis and mathematical modeling on a representative microstructure for a solar sailing application are conducted by considering the effects of Joule heating, solar radiation, and thermal reemission radiation simultaneously. Forces and moments resulting from solar radiation and thermal reemission are predicted. Numerical solutions from the electro-thermo-mechanical model of the microstructure are in good agreement with results given by finite element analysis. This model provides an efficient approach for active control of the forces and moments on the microstructures for solar sailing application.
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653 $a Reflective surfaces
653 $a Spacecraft
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